Originally Posted by poison

H22A into Civic information:

MERGING OBD1 CIVIC HARNESS TO H22A ENGINE:
- Take off and mark every single harness connector on where it came from/where it goes from both H22A and stock civic engine. Make sure you label them of where pulled the plug from! This will save a TON of time!

Mount Civic harness on H22A and measure/modify wire to be lengthened/changed as follows:

- Change fuel injector connectors to H22A type and add resistor pack from H22A harness to Civic harness (see diagram on page 4)
- Extend Alternator wires to reach the H22A alternator (match the pinouts)
- Lengthen wire that goes to the starter solenoid on starter
- Attach reverse light sensor wire to the new H22A reverse light sensor wire

O2 sensor (CX only) add 3 wires to O2 sensor and follow o2 wires and change to Prelude O2 sensor connector. And wire the following:

- WHT/RED wire goes to D14 which is O2 Sensor Input
- ORG/BLK wire goes to A6, which is Heater Control
- GRN/WHT wire goes to D22 which is Sensor Ground
- YEL/BLK wire goes to A25 which is Sensor voltage

VTEC wiring: This applies to DX,LX,CX models only in 93-95!

- Wire from the VTEC Solenoid to the A4 pinout at the ECU. Add the pin to the shock tower harness, and female pin at the female shock tower connector.

Knock sensor wiring: (mounted at the rear of the engine near the cylinder head)

Air Intake Bypass solenoid (secondary butterflies)

- Sensor voltage to the A25 pinout (or splice into the Yel/Blk wire connector at the driver shock tower harness.
- ECU Signal leading to A17 pinout on ECU

EGR (Exhaust Gas Recirculation) System: Applies to all model civics except VX

- EGR lift valve solenoid – sensor voltage (A25 pinout) & ECU signal to A11
- EGR lift sensor – sensor voltage (A25 pinout), ground (D22 pinout) & ECU sensor signal to D12

MOUNT KITS AVAILABLE:

- HASport mount kit
- Place Racing Mounts
- HCP Mount kits

MAINTENANCE PRE-CAUTIONS

- Timing Belt for 92-96 USDM Prelude VTEC (2.2L) - $39.99 from AutoZone
- Water Pump for 92-96 USDM Prelude VTEC (2.2L) - $34.99 w/lifetime warranty from AutoZone
- Spark Plugs for USDM 92-96 Prelude VTEC (2.2L) – approx. $8
- Extended Fuel filter hose (from fuel filter to fuel rail) – You can use an extended fuel line and use hose connectors/clamps, or contact a local hose factory to have a custom hose made.
- Throttle Body gasket for Prelude VTEC (Honda dealership) $7

Drivetrain options:
- Right 90-93 Integra Axle
- Left Custom 92 Prelude Inner CV joint with 90-93 shaft & Outer CV joint from Raxles for $170 1-800-257-8192
OR
- 1990 Accord Intermediate Shaft
- Left and Right 90-93 Integra Axles
OR
- Driveshaftshop.com Stage/Level 1 axles Right & Left side using prelude intermediate shaft

Radiator options:
- FAL import racing fan for 92-00 Civic for $169.95 from Summit Racing 1-800-962-9094 with 1994-97 Del Sol VTEC Radiator or Integra Radiator
OR
- C&R Import Racing aluminum radiator with SPAL fan for DOHC motors - $439.95 (317) 293-4100

- 1992 Integra LS Upper Radiator Hose – approx. $15
- 1994 Del Sol VTEC lower radiator hose – approx. $15

If you are running NO A/C then you can get alternator belt - Part No. 25-060370 from NAPA Auto parts which is $20 or any 36-37” belt with 6 teeth.

I will post pictures here in a second...